Sorry, my friend ... I was being facetious and highly sarcastic. They aren't celebrating "Stonewall Jackson Day" ... they are celebrating "Stonewall Day," which the article describes thus:
"Stonewall Day marks when New York City police conducted a raid on a gay bar in 1969 which led to the Stonewall riots. The riots helped launch the modern gay rights movement."
I wuz jest havin' a lil' fun at their expense, don'tcha know.